package com.youi.util;

import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;

/**
 * 二维码工具类
 * @author erdong.Chan
 *
 */
public class QrCodeUtil {
	
	 public static void  main(String [] args) throws IOException, WriterException{  
		 QrCodeUtil cpCode = new QrCodeUtil();  
		 	//	      生成二维码  
	        cpCode.createCode("","");  
	        //	      解析二维码  
	        //cpCode.parseCode(new File("D:/二维码生成/TDC-test.png"));  
	          
	    }  
	    /** 
	     * 二维码的生成 
	     * 
	     */  
	    public static void createCode(String saveUrl,String url){  
	        String text = url;  
	        int width = 300;  
	        int height = 300;  
	        // 二维码的图片格式  
	        String format = "png";  
	        /** 
	         * 设置二维码的参数 
	         */  
	        HashMap hints = new HashMap();  
	        // 内容所使用编码  
	        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");  
	        try {  
	            BitMatrix bitMatrix = new MultiFormatWriter().encode(text,BarcodeFormat.QR_CODE,width,height,hints);  
	            // 生成二维码  
	            File outputFile = new File(saveUrl);  
	           // MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);  
	            BufferedImage image = toBufferedImage(bitMatrix);  
		   	     if (!ImageIO.write(image, format, outputFile)) {  
		   	       throw new IOException("Could not write an image of format " + format + " to " + outputFile);  
		   	     }    
	        } catch (Exception e) {  
	            e.printStackTrace();  
	        }  
	          
	    }  
	    
	    /** 
	     * 二维码的生成 
	     * 
	     */  
	    public static void createCode(String saveUrl,String url,Integer width,Integer height){  
	        String text = url;  

	        // 二维码的图片格式  
	        String format = "png";  
	        /** 
	         * 设置二维码的参数 
	         */  
	        HashMap hints = new HashMap();  
	        // 内容所使用编码  
	        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");  
	        try {  
	            BitMatrix bitMatrix = new MultiFormatWriter().encode(text,BarcodeFormat.QR_CODE,width,height,hints);  
	            // 生成二维码  
	            File outputFile = new File(saveUrl);  
	           // MatrixToImageWriter.writeToFile(bitMatrix, format, outputFile);  
	            BufferedImage image = toBufferedImage(bitMatrix);  
		   	     if (!ImageIO.write(image, format, outputFile)) {  
		   	       throw new IOException("Could not write an image of format " + format + " to " + outputFile);  
		   	     }    
	        } catch (Exception e) {  
	            e.printStackTrace();  
	        }  
	          
	    } 
	    
	    /** 
	     * 二维码的解析 
	     * 
	     * @param file 
	     */  
	    public void parseCode(File file)  
	    {  
	        try  
	        {  
	            MultiFormatReader formatReader = new MultiFormatReader();  
	   
	            if (!file.exists())  
	            {  
	                return;  
	            }  
	   
	            BufferedImage image = ImageIO.read(file);  
	   
	            LuminanceSource source = new BufferedImageLuminanceSource(image);  
	            Binarizer binarizer = new HybridBinarizer(source);  
	            BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);  
	   
	            Map hints = new HashMap();  
	            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");  
	   
	            Result result = formatReader.decode(binaryBitmap, hints);  
	   
	            System.out.println("解析结果 = " + result.toString());  
	            System.out.println("二维码格式类型 = " + result.getBarcodeFormat());  
	            System.out.println("二维码文本内容 = " + result.getText());  
	        }  
	        catch (Exception e)  
	        {  
	            e.printStackTrace();  
	        }  
	    }  
	    
	    
	    private static final int BLACK = 0xFF000000;  
		private static final int WHITE = 0xFFFFFFFF;  
		   
		   //private MatrixToImageWriter() {}  
		public static BufferedImage toBufferedImage(BitMatrix matrix) {  
		     int width = matrix.getWidth();  
		     int height = matrix.getHeight();  
		     BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);  
		     for (int x = 0; x < width; x++) {  
		       for (int y = 0; y < height; y++) {  
		         image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);  
		       }  
		     }  
		     return image;  
		   }  
		   
		     
		   public static void writeToFile(BitMatrix matrix, String format, File file)  
		       throws IOException {  
		     BufferedImage image = toBufferedImage(matrix);  
		     if (!ImageIO.write(image, format, file)) {  
		       throw new IOException("Could not write an image of format " + format + " to " + file);  
		     }  
		   }  
		   
		     
		   public static void writeToStream(BitMatrix matrix, String format, OutputStream stream)  
		       throws IOException {  
		     BufferedImage image = toBufferedImage(matrix);  
		     if (!ImageIO.write(image, format, stream)) {  
		       throw new IOException("Could not write an image of format " + format);  
		     }  
		   }  
		     
		   
}


class BufferedImageLuminanceSource extends LuminanceSource {  
	  
	  private final BufferedImage image;  
	  private final int left;  
	  private final int top;  
	  
	  public BufferedImageLuminanceSource(BufferedImage image) {  
	    this(image, 0, 0, image.getWidth(), image.getHeight());  
	  }  
	  
	  public BufferedImageLuminanceSource(BufferedImage image, int left, int top, int width, int height) {  
	    super(width, height);  
	  
	    int sourceWidth = image.getWidth();  
	    int sourceHeight = image.getHeight();  
	    if (left + width > sourceWidth || top + height > sourceHeight) {  
	      throw new IllegalArgumentException("Crop rectangle does not fit within image data.");  
	    }  
	  
	    for (int y = top; y < top + height; y++) {  
	      for (int x = left; x < left + width; x++) {  
	        if ((image.getRGB(x, y) & 0xFF000000) == 0) {  
	          image.setRGB(x, y, 0xFFFFFFFF); // = white  
	        }  
	      }  
	    }  
	  
	    this.image = new BufferedImage(sourceWidth, sourceHeight, BufferedImage.TYPE_BYTE_GRAY);  
	    this.image.getGraphics().drawImage(image, 0, 0, null);  
	    this.left = left;  
	    this.top = top;  
	  }  
	  
	  @Override  
	  public byte[] getRow(int y, byte[] row) {  
	    if (y < 0 || y >= getHeight()) {  
	      throw new IllegalArgumentException("Requested row is outside the image: " + y);  
	    }  
	    int width = getWidth();  
	    if (row == null || row.length < width) {  
	      row = new byte[width];  
	    }  
	    image.getRaster().getDataElements(left, top + y, width, 1, row);  
	    return row;  
	  }  
	  
	  @Override  
	  public byte[] getMatrix() {  
	    int width = getWidth();  
	    int height = getHeight();  
	    int area = width * height;  
	    byte[] matrix = new byte[area];  
	    image.getRaster().getDataElements(left, top, width, height, matrix);  
	    return matrix;  
	  }  
	  
	  @Override  
	  public boolean isCropSupported() {  
	    return true;  
	  }  
	  
	  @Override  
	  public LuminanceSource crop(int left, int top, int width, int height) {  
	    return new BufferedImageLuminanceSource(image, this.left + left, this.top + top, width, height);  
	  }  
	  
	  @Override  
	  public boolean isRotateSupported() {  
	    return true;  
	  }  
	  
	  @Override  
	  public LuminanceSource rotateCounterClockwise() {  
	  
	    int sourceWidth = image.getWidth();  
	    int sourceHeight = image.getHeight();  
	  
	    AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0, 0.0, 0.0, sourceWidth);  
	  
	    BufferedImage rotatedImage = new BufferedImage(sourceHeight, sourceWidth, BufferedImage.TYPE_BYTE_GRAY);  
	  
	    Graphics2D g = rotatedImage.createGraphics();  
	    g.drawImage(image, transform, null);  
	    g.dispose();  
	  
	    int width = getWidth();  
	    return new BufferedImageLuminanceSource(rotatedImage, top, sourceWidth - (left + width), getHeight(), width);  
	  }  
	  
	}  
